Just to put it out there, I COMPLETELY AND FULLY SUPPORT UBI.
That’s not what rigged means. And either you didn’t understand the selection process or you don’t want to understand it because you are against the idea of the UBI
My example of the (I think Canadian) study, was set up in a way that could only produce a positive result. In other words, they excluded people who would contradict the result that the study organizer was after. It was rigged in quite a few ways, not only in selection bias but also in publication bias, and researcher bias.
That particular study left me doubting other studies, which is why I think it’s important to acknowledge that these bias’ exist.
That’s not to say that this pilot wasn’t a huge success, as I do think it was!
But if you specifically omit alcoholics or drug users, then it’s hard to conclude that “The researchers found no evidence that any of the payments discouraged work or increased purchases of alcohol".
It’s a bit of a sham research in this regard, but that doesn’t detract from the fact that UBI can improve someone’s quality of life.